It is also easy to see who the consumer and provider are by the fact that the Service specification realizes the provided shipping interface and USES the required ScheduleProcessing interface.
Figure 11 shows that the Shipper service provides the shipping service as specified by the ShippingService service specification.
图11显示了Shipper服务提供交付服务作为ShippingService服务规范所指定的内容。
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It is also easy to see who the user and provider are by the fact that the Service specification realizes the provided shipping interface and USES the required ScheduleProcessing interface.